| Water
disinfection
using
UV irradiation has emerged in the past years as a good alternative due
to growing concerns with chlorinated by-products and safety of
measuring
chlorination. It is known that the performance of UV reactors is
determined
by distribution of UV dose, defined as the product of hydraulic
residence
time and light irradiance intensity. However, information for
hydraulic
residence time for evaluating hydraulic performance of UV reactors are
limited. In this project a real time 2D digital particle image
velocimetry
is used to measure velocity distribution in two UV reactors, UV-SWIFT
and
UV-MAX. Turbulence, Reynolds stresses, dissipation, and vorticity at
the
regions of the wall of the reactor and the near-far fields of the UV
lamps
are characterized for the purpose of calibrating and verifying the
models
of UV reactors. We are currently working on characterization of mixing
and 3D turbulent motions using laser-induced flow visualization and 3D
particle image velocimetery. In addition, a flunet CFD software is used
to examine irradiation efficicay of UV disinfection process
Sponsor : AWWARF, North Carolina State
University, Trojan
Technologies Inc.
Status : Closed
Student Investigators: Aifeng Yao (Ph.D.), Doo-Yong Choi
(Ph.D.)
- Liu,D., Wu, C.H., Linden, K., and Ducoste, J., Numerical
simulation of
UV disinfection reactors: evaluation and alternative turbulence models,
Applied Mathematical Modelling, 31(9),1753-1769, 2007.
  
Raw
image
Velocity and
Vorticity
UV-MAX
|
UV-SWIFT
|